213803 has 4 divisors (see below), whose sum is σ = 218400. Its totient is φ = 209208.

The previous prime is 213799. The next prime is 213821. The reversal of 213803 is 308312.

213803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213803 - 2² = 213799 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213803.

It is not an unprimeable number, because it can be changed into a prime (213833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228 + ... + 2321.

It is an arithmetic number, because the mean of its divisors is an integer number (54600).

2²¹³⁸⁰³ is an apocalyptic number.

213803 is a deficient number, since it is larger than the sum of its proper divisors (4597).

213803 is an equidigital number, since it uses as much as digits as its factorization.

213803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4596.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 213803 is about 462.3883649055. The cubic root of 213803 is about 59.7958804483.

The spelling of 213803 in words is "two hundred thirteen thousand, eight hundred three".